Determining Cooling Status
Clg Status is a status item which indicates whether or not
mechanical cooling is currently allowed. If cooling is disabled,
the reason is indicated.
The following are descriptions of cooling status states.
Enabled
Mechanical cooling is enabled if all the following are true:
• Control mode is not set via the keypad to fan only or heat
only
• Control mode is set via the keypad to auto and not
disabled via a network command
• The outdoor air temperature (OAT) is high enough for
operation
• Compressor operation is not disabled by an alarm
condition
None
Cooling capability is not provided.
Off Ambient
The outdoor air temperature (OAT) is too low for operation.
The OAT becomes too low for operation when it drops below
the OAT cooling lockout setting. OAT becomes high enough for
operation when it rises above the OAT cooling lockout setting
by more than 2°F (adjustable - OAT Diff).
Off Alarm
Compressor operation is disabled by an alarm condition.
Off Network
Control mode is set via the keypad to auto and cooling is
disabled via a network command.
Off Manual
Control mode is set to Fan Only or Heat Only via the keypad
display.
Determining Heat Status
Htg Status is a status item which indicates whether or not the
primary source of heating in the unit is currently allowed. On
heat pump units this is the compressor heating. On non-heat
pump units this is the gas, electric or hot water heat.
The following are descriptions of the heating status states:
Enabled
If the unit is a heat pump, compressor heating is enabled if all of
the following are true:
• Control Mode is not set via the keypad to fan only or cool
only
• Control Mode is set via the keypad to auto and heating is
not disabled via a network command
• The outdoor air temperature (OAT) is warm enough
(above 0°F default) and cool enough (below 55°F default)
for compressor heating operation.
If the unit is not a heat pump, heating is enabled if all of the
following are true:
• Heating capability is provided
• Control Mode is not set via the keypad to fan only or cool
only
• Control Mode is set via the keypad to auto and heating is
not disabled via a network command
• The outdoor air temperature (OAT) is cool enough (below
55°F default) for heating operation.
None
Unit is not a heat pump and heating capability is not provided
Off Ambient
If unit is a heat pump, the OAT is too high or too low for
compressor heating operation. OAT becomes too high for
compressor heat operation when it rises above the high OAT
heating lock out set point. The OAT becomes low enough for
compressor heat operation when it drops below the high OAT
heating lock out set point by more than the heating lockout
differential. The The OAT becomes too low for compressor
heat operation when it falls below the low OAT heating lock out
set point. The OAT becomes high enough for compressor heat
operation when it rises above the low OAT heating lock out set
point by more than the heating lockout differential.
If unit is not a heat pump, the OAT is too high for heating
operation. The OAT becomes too high for heat operation when
it rises above the high OAT heating lock out set point. The
OAT becomes low enough for heat operation when it drops
below the high OAT heating lock out set point by more than the
heating lockout differential.
Off Network
Control Mode is set via the keypad to auto and heating is
disabled via a network command.
Off Manual
Control Mode is set via the keypad to fan only or cool only..
OM 1141-3 • MICROTECH UNIT CONTROLLER 92 www.DaikinApplied.com
operator’s guIde
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